"If you can't be in France you can still enjoy mini Croque-Monsieur appetizers. Your guests will love this take on a French classic...."
INGREDIENTS
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2 tablespoons butter
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2 tablespoons flour
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1 cup milk
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1 1/2 tablespoon whole grain dijon mustard
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salt and pepper
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1 sheet puff pastry, 14 oz
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1/2 cup ham , diced
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1 cup gruyere, shredded
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1 egg, lightly beaten with water